Dust collector or separator



April 8, 1930. J. WHITMORE DUST COLLECTOR OR SEPARATOR Original FiledJan. 15

Patented Apr. 8, 1930' UNITED STATES PATENT OFFICE Joan wnrrmoan, orBELFAST, IRELAND, ASSIGNQR r navrpson & commmz, :nrm- ITED, or smoccoENGINEERING-WORKS, BELFAST, "IRELAND DUST COLLECTOR on srrrnim'roaOriginal application filed January 15, 1926, Serial No. 81,369, and inGreat Britain December 5, 1925.

Divided and this application filed September 8, 1926. Serial No.134,265. g

This invention relates to dust collectors or separators and the like,and has for its object. to provide improved means for reducing andovercoming the resistanceset up by the whirling body of air within theseparating chamber, more particularly .of that kind of apparatus inwhich a tubular outlet, such as a chimney or the like, passes verticallythrough the separating chamber and the purified air escapes from thechamber into the said outlet through an opening provided in the side ofthe outlet.

According to my present invention 1' arrange a number of stationaryguide vanes over the said opening in the. wall of the outlet or chimneyin such a manner that the whirling flow of the dust-laden air is converted without shock into a linear flow during the passage of thepurified air over the surface of the vanes from the exterior to theinterior of the chimney.

Various constructional forms according to the invention will now bedescribed as examples with reference to the accompanying diagrammaticdrawings, in which Fig. 1 shows one arrangement of the recti fying vanesaccording to the invention covering the opening in the wall of an outletchimney.

1. 1 of Figure 1.

Figs. 2, 3 and 4 show alternative arrangements of the said rectifyingvanes. 1 Figure 3 is a section taken along the line BF-3 of Figure 3.Referring to the drawings generally, the apparatus diagrammaticallyrepresented consists of a vertically arranged chimney 1 of constantdiameter or cross section which passes through the dust collector orseparator casing 2, as illustrated and described in my co-pendingapplication No. 81,369, of which the present application is a division.

The present invention is more particularly applicable to dustcollect-ing apparatus of the Figure 1 is a section taken along the linekind illustrated in Figs. 4"and' 9 of m copending application No.710,106, an in which the purified air, after the dust and the like solidparticles have been separated therefrom, passes through an opening 17formed in the wall of that part of the chimney 3 passing through thecasing 1, as indicated in the drawings of'that application.

According to my present invention I arrange a number of stationary guidevanes 4 over an opening 3 (corresponding to the said opening 17 in myearlier application) in such a manner that the vanes convert the whirl.-ing body of air into a linear flow without shock as the said air passesover the surface of the vanes when escaping from the casing 2 into thechimney 1.

Fig. 1 of the drawings shows the guide vanes 4 arranged Vertically overthe opening 3 in the chimney 1. The vanes 4 are attached to the upperand lower edges of the opening 3 and the intake or leadin edges 5 of thevanes are flush with the ins'i e of the chimney and are curved in such amanner as to pick up the whirling body of air and change its directionfrom a vortical to a, linear flow without shock while the said air ispassing from the outside to the inside of the chimney 1, after which theair will pass up the chimney in the usual manner, all vortical motionhaving been thus destroyed and the resistance to the escape of the airreduced to'a minimum. c Fig. 2 shows a modification of the arrangementshown .in Fig. 1 in which the vanes 4, instead of being arrangedvertically, are arranged diagonally, or at an angle to-the vertical, andwith their intake edges flush-with the outside of the chimney.

Figs. 3 and 3 show a further modification R5 in which a set of verticalvanes 4 projects beyond the exterior of the chimney and into thecollector casing 2.

Fig.- 4 shows yet another modification in which the vanes 4 projectatone end 6 away from the chimney into the interior of the casing 2,while the other end 7 is arranged flush, or approximatel so, with eitherthe interior or exterior 0 the chimney.

In all of the arrangements illustrated the whirling air, after the dustis separated therefrom, is forced gradually inwards by the continuedinflux of the dust laden current and by the volute or spiral formationof casing 2 when such construction is employed, and, on engaging theouter wall of the tubular outlet or chimney 1, is caused to flow overthe surface of the vanes 4 and thus to change its direction of flowwithout shock from a vortical into a linear path as it passes from thecasing 2 into the interior of the chimney 1, thus effecting aconsiderable reduction in the resistance to the escape of the said airfrom the apparatus due to the vertical motion originally imparted to thedust-laden current after entering the apparatus.

In the following claims the term gas is to be understood as includingair, vapour, and fluid currents such as smoke consisting of a mixture ofgas or vapour and solid particles. The dust collecting passageway isindicated at 6, the said passageway opening into the vortex chamber, andpermitting the collection of dust therethrough. There is also provided adust collecting lip adjacent the passageway,whereby dust will be thrownout from the air and collected through the passageway 6. The air willpass out through the opening 3 into the chimney 1 without shock, sincethe pressure in the chimney 1 is less than that in the vortex chamber.The air will accordingly take the path of least resistance and will passout into the chamber without reversal of direction of flow.

What I claim and desire to secure by Letters Patent is 2- 1. Thecombination, in a dust collector, of a vortex chamber, a chimney passingcompletely therethrough having a passageway in the side of the chimneycommunicating with the vortex chamber and vanes associated with saidpassageway whereby the whirling flow of gas in the vortex chamber isconverted ,into linear flow in the chimney without shock in order toeflect a reduction in the resistance within the apparatus.

2. The combination, in a dust collector, of a vortex chamber having aside wall,- top and bottom walls, and tangential inlet passage way, achimney passing through the top and bottom walls of the vortex chamberwithout communicating with the interior of the vor tex chamber saidchimney having an opening in the side of the chimney located adjacent tothe inlet passageway at a point where the gases in the vortex chambercomplete the revolution therein and vanes in said opening forfacilitating the removal of gases at the end of their revolution anddelivering them into the chimney.

3. The combination, in a dust collector, of a vortex chamber having aside wall, top and bottom Walls, and a tangential inlet passageway, achimney passing through the top and bottom walls of the vortex chamberwithout communicating with the interior of the vortex chamber saidchimney having an opening in the side of the chimney located adjacent tothe inlet passageway at a point where the gases in the vortex chambercomplete the revolution therein and vanesin said opening forfacilitating the removal of gases at the end oftheir revolution anddelivering them into the chimney, said chimney being located in saidvortex chamber closer to the wall of the chamber adjacent the vortexchamber inlet passageway opening than in any other place in the chamber.

4. The combination, in a dust collector, of a vortex chamber, a chimneypassing completely therethrough having a passageway in the side of thechimney communicating with the vortex chamber and vanes associated withsaid opening, whereby the whirling flow of gas in the vortex chamber isconverted into linear flow in the chimney without shock in order toeifect a reduction in the resistance within the apparatus and means tocollect the dust thrown out in the vortex chamber.

5. The combination, in a dust collector, of a vortex chamber having aside wall, top and bottom walls, and tangential inlet passageway, achimney passing through the top and bottom walls of the vortex chamberwithout communicating with the interior of the vortex chamber saidchimney having an opening in the side of the chimney located adjacent totheinlet passageway at a point Where the gases in the vortex chambercomplete the revolution therein and vanes in said opening forfacilitatin the removal of gases at the end of their rst revolution anddelivering them into the chimney, and means to collect the dust thrownout in the vortex chamber.

6. The combination, in a dust collector, of

a vortex chamber having a side wall, top and bottom walls, and atangential inlet passageway, a chimney passing through the top andbottom walls of the vortex chamber without communicating with theinterior of the vortex chamber said chimney having an opening inthe sideof thechimney located adjacent to the inlet passageway at a point wherethe gasesin the vortex chamber complete a revolution therein, vanes insaid opening for facilitating the removal of gases at the end of theirrevolution and delivering them into the chimney, said chimney beinglocated in said vortex chamber closer to the wall of the chamberadjacent the vortex chamber inlet opening1 than in any other place inthe chamber, an means to collect the dust thrown out in the vortexchamber.

7. The combination, in a dust collector, a

vortex chamber, a chimney passin therethrough having an opening in thesi e thereof communicating with said chamber, said chimney being locatednearer to the Wall at the end of the vortex movement than at any otherpoint in the vortex chamber, vanes associated with the opening into thechimney for collecting the vortex air and delivering it into thechimney, and a dust-collecting passageway having a collecting lipprojected through the wall of said vortex chamber adj acent the openingin the chimney whereby the dust thrown out against the wall of thevortex chamber will be collected and the air will pass into the chimneywithout shock.

8. The combination, in a dust collector, of a casing comprising a vortexchamber, a chimney passing completely therethrough having an opening inthe side the'reofcommunicating with the vortex chamber and vanesattached to the chimney in said opening, one part of which vanes projectaway from the wall of the chimney into the easing and another part beingapproximately flush with the chimney wall, whereby the whirling flow ofthe gas is converted into a linear flow in the chimney without shockduring the passage of the gas over the. surface of the vanes.

9. The combination in a dust collector of a volute vortex chamber, achimney passing therethrough, said chimney having an open.- ing in theside thereof communicating with the interior of the vortex chamber andthe interior of the chimney, said opening being placed in the portion ofthe chimney nearest to the side wall of the said volute vortex chamber.

10. The combination in a dust collector of a volute vortex chamber, achimney passing therethrough, said chimney having an openingcommunicating with the interior of the vortex chamber, and in thatportion of the chimney nearest to the side wall ofthe vortex chamber,and vanes associated with said opening for collecting the gases in thevortex chamber at the end of the revolution of the gasestherein, anddirectin said gases into said chimney at right ang es to the vortex flowwithout shock, whereby the minimumof resistance is experienced in theoperation of the apparatus.

11. The combination in a dust collector of a volute vortex chamber, achimney'passing therethrough, said chimney having an openingcommunicating with the interior of the vortex chamberand in the portionof the chimney nearest to the side wall of the vor-' tex chamber, andmeans 'to collect the dust thrown out in the vortex chamber.

12. The combination in a dust collector of a vortex chamber, a chimneypassing therethrough, said chimne communicating with t e interior of thevortex chamber, and in the portion of the chimhaving an opening the dustthrown out in the vortex chamber.

I In testimony whereof I affix my signature.

JOHN WHITMORE.

